/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0a192f;
  --bg-secondary: #112240;
  --bg-tertiary: #1a2f4a;
  --text-primary: #ccd6f6;
  --text-secondary: #8892b0;
  --accent: #64ffda;
  --accent-hover: #52e3c2;
  --border: #233554;
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --accent: #0891b2;
  --accent-hover: #0e7490;
  --border: #e2e8f0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 16px;
  transition: background-color 0.3s ease, color 0.3s ease;
  opacity: 0;
  animation: fadeIn 0.6s ease-in forwards;
}

body.loaded {
  opacity: 1;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* Theme Toggle Button */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  color: var(--accent);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 1000;
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
  transform: rotate(20deg);
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
  position: relative;
}

.container::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(100, 255, 218, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(100, 255, 218, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

[data-theme="light"] .container::before {
  background: 
    radial-gradient(circle at 20% 50%, rgba(8, 145, 178, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(8, 145, 178, 0.05) 0%, transparent 50%);
}

/* Header */
.header {
  text-align: center;
  padding: 60px 0 80px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 60px;
}

.name {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.aka {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: -5px 0 10px 0;
  font-weight: 400;
  font-style: italic;
}

.title {
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 30px;
  font-weight: 500;
}

.social-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 30px;
}

.social-links a {
  color: var(--text-secondary);
  font-size: 1.5rem;
  transition: all 0.3s ease;
  padding: 10px;
}

.social-links a:hover {
  color: var(--accent);
  transform: translateY(-3px);
}

/* Main Content */
.main-content {
  margin-bottom: 80px;
}

.section {
  margin-bottom: 100px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.fade-in {
  opacity: 1;
  transform: translateY(0);
}

.section-title {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 30px;
  font-weight: 600;
  position: relative;
  padding-bottom: 12px;
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 60px;
  height: 3px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.section-title:hover::after {
  width: 100px;
}

/* About Section */
.about-text {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 20px;
  color: var(--text-secondary);
}

/* Experience Section */
.experience-timeline {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.experience-item {
  margin-bottom: 0;
  padding: 25px;
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  transition: all 0.3s ease;
}

.experience-item:hover {
  background: var(--bg-tertiary);
  transform: translateX(5px);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 10px;
}

.experience-item h3 {
  font-size: 1.3rem;
  color: var(--text-primary);
  font-weight: 600;
}

.experience-role {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 10px;
}

.experience-role h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  font-weight: 500;
  margin: 0;
}

.period {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--accent);
}

.company {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 500;
}

.description {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.skill-category h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 15px;
  font-weight: 600;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-block;
  padding: 8px 16px;
  background: var(--bg-secondary);
  color: var(--accent);
  border-radius: 4px;
  font-size: 0.9rem;
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.tag:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(100, 255, 218, 0.15);
}

[data-theme="light"] .tag:hover {
  box-shadow: 0 4px 12px rgba(8, 145, 178, 0.15);
}

/* Education Section */
.education-item {
  margin-bottom: 35px;
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: 4px;
}

.education-item h3 {
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.institution {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 5px;
}

.education-item .period {
  display: block;
  margin-bottom: 10px;
}

.details {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.achievements {
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: 4px;
  border-left: 3px solid var(--accent);
}

.achievements h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 15px;
}

.achievements ul {
  list-style: none;
  padding-left: 0;
}

.achievements li {
  padding: 8px 0;
  padding-left: 25px;
  position: relative;
  color: var(--text-secondary);
}

.achievements li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 1.2rem;
}

/* Footer */
.footer {
  text-align: center;
  padding: 60px 0 40px;
  margin-top: 60px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .name {
    font-size: 2.5rem;
  }

  .title {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .experience-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 20px 15px;
  }

  .header {
    padding: 40px 0 60px;
  }
}

@media (max-width: 480px) {
  .name {
    font-size: 2rem;
  }

  .social-links {
    gap: 15px;
  }

  .social-links a {
    font-size: 1.3rem;
  }
}

/* Writing Section */
.blog-timeline {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.blog-item {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 20px;
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  transition: all 0.3s ease;
}

.blog-item:hover {
  background: var(--bg-tertiary);
  transform: translateX(5px);
}

.blog-year {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
  min-width: 50px;
}

.blog-title {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

.blog-title:hover {
  color: var(--accent);
}

/* Instagram Embed Section */
.instagram-embed {
  margin-bottom: 60px;
}

.instagram-container {
  display: flex;
  justify-content: center;
  max-width: 100%;
  margin: 0 auto;
}

.instagram-container blockquote.instagram-media {
  margin: 0 auto !important;
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border) !important;
  border-radius: 8px !important;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

[data-theme="light"] .instagram-container blockquote.instagram-media {
  background: #FFF !important;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

@media (max-width: 768px) {
  .instagram-container blockquote.instagram-media {
    min-width: 100% !important;
    width: 100% !important;
  }
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Selection */
::selection {
  background: var(--accent);
  color: var(--bg-primary);
}